Drop MongoDb collection and create with the old indexes

Question

I'm using spring data to manage mongoDb collection and to remove all elements of some collections I'm using mongoTemplate.dropCollection(Anomaly.class); because the collection is too big to use the deleteAll() of CrudRepository. The problem is the creation of the collection when a new document is added. The collection doesn't have the indexes (except the _id) despite the java class is correctly annotated:

@Field("anomaly_id")
@JsonProperty("anomaly_id")
@Indexed(unique = true)
private String anomalyId;

I tried with mongoTemplate.createCollection(Anomaly.class) with the same result, but if I restart tomcat on the startup the collection is created with the indexes. How can I fix this problem?Thanks

score 0 · Answer 1 · answered May 02 '19 at 04:42

I think you can do index 2 way. 1. @index in field you want 2. Do it programly

Please refer to this (Spring Data MongoDB - Where to create an index programmatically for a Mongo collection?)

because the collection is too big to use the deleteAll(), you are doing bigdata probblem so maybe this won't help.

Drop MongoDb collection and create with the old indexes

1 Answers1